Objective: to assess the relationship between serums vitamin D level and type 1 diabetes mellitus (T1DM) in children. Methods: the following electronic databases were searched until Sep 2014 to identify relevant studies that assessed the relationship between serum vitamin D with T1DM: PubMed\EMbase\Medline\Central Register of Controlled Trials\CBM\Chinese National Knowledge Infrastructure (CNKI)\wangfang; The NOS scale was used to evaluate the quality of studies, and the statistical tests were performed by Stata 11.0 software. Result: a total of 10 studies were included in this study. Our results showed that serum vitamin D was significantly lower in children with T1DM than in healthy controls (MD = -0.60, P < 0.05). No evidence support publication bias in present study. Conclusion: the meta-analysis suggests that serum vitamin D level is associated with T1DM in children.